Commit | Line | Data |
---|---|---|
51595ca2 | 1 | /* if_en.c 4.71 82/10/31 */ |
11720282 BJ |
2 | |
3 | #include "en.h" | |
f1b2fa5b | 4 | |
11720282 | 5 | /* |
f1b2fa5b | 6 | * Xerox prototype (3 Mb) Ethernet interface driver. |
11720282 BJ |
7 | */ |
8 | ||
9 | #include "../h/param.h" | |
10 | #include "../h/systm.h" | |
11 | #include "../h/mbuf.h" | |
11720282 BJ |
12 | #include "../h/pte.h" |
13 | #include "../h/buf.h" | |
8a13b737 BJ |
14 | #include "../h/protosw.h" |
15 | #include "../h/socket.h" | |
8a13b737 | 16 | #include "../h/vmmac.h" |
eaa60542 BJ |
17 | #include <errno.h> |
18 | ||
19 | #include "../net/if.h" | |
20 | #include "../net/netisr.h" | |
21 | #include "../net/route.h" | |
d2cc167c BJ |
22 | #include "../netinet/in.h" |
23 | #include "../netinet/in_systm.h" | |
d2cc167c BJ |
24 | #include "../netinet/ip.h" |
25 | #include "../netinet/ip_var.h" | |
26 | #include "../netpup/pup.h" | |
eaa60542 BJ |
27 | |
28 | #include "../vax/cpu.h" | |
29 | #include "../vax/mtpr.h" | |
30 | #include "../vaxif/if_en.h" | |
31 | #include "../vaxif/if_enreg.h" | |
32 | #include "../vaxif/if_uba.h" | |
33 | #include "../vaxuba/ubareg.h" | |
34 | #include "../vaxuba/ubavar.h" | |
8a13b737 | 35 | |
a453e1b5 | 36 | #define ENMTU (1024+512) |
dc39362e | 37 | #define ENMRU (1024+512+16) /* 16 is enough to receive trailer */ |
11720282 | 38 | |
11720282 BJ |
39 | int enprobe(), enattach(), enrint(), enxint(), encollide(); |
40 | struct uba_device *eninfo[NEN]; | |
41 | u_short enstd[] = { 0 }; | |
42 | struct uba_driver endriver = | |
b454c3ea | 43 | { enprobe, 0, enattach, 0, enstd, "en", eninfo }; |
11720282 BJ |
44 | #define ENUNIT(x) minor(x) |
45 | ||
f1b2fa5b BJ |
46 | int eninit(),enoutput(),enreset(); |
47 | ||
48 | /* | |
49 | * Ethernet software status per interface. | |
50 | * | |
51 | * Each interface is referenced by a network interface structure, | |
52 | * es_if, which the routing code uses to locate the interface. | |
53 | * This structure contains the output queue for the interface, its address, ... | |
54 | * We also have, for each interface, a UBA interface structure, which | |
55 | * contains information about the UNIBUS resources held by the interface: | |
56 | * map registers, buffered data paths, etc. Information is cached in this | |
57 | * structure for use by the if_uba.c routines in running the interface | |
58 | * efficiently. | |
59 | */ | |
8a13b737 | 60 | struct en_softc { |
f1b2fa5b BJ |
61 | struct ifnet es_if; /* network-visible interface */ |
62 | struct ifuba es_ifuba; /* UNIBUS resources */ | |
63 | short es_delay; /* current output delay */ | |
64 | short es_mask; /* mask for current output delay */ | |
0658a645 | 65 | short es_lastx; /* host last transmitted to */ |
f1b2fa5b BJ |
66 | short es_oactive; /* is output active? */ |
67 | short es_olen; /* length of last output */ | |
8a13b737 | 68 | } en_softc[NEN]; |
11720282 | 69 | |
f1b2fa5b BJ |
70 | /* |
71 | * Do output DMA to determine interface presence and | |
72 | * interrupt vector. DMA is too short to disturb other hosts. | |
73 | */ | |
11720282 BJ |
74 | enprobe(reg) |
75 | caddr_t reg; | |
76 | { | |
b454c3ea | 77 | register int br, cvec; /* r11, r10 value-result */ |
11720282 BJ |
78 | register struct endevice *addr = (struct endevice *)reg; |
79 | ||
80 | #ifdef lint | |
81 | br = 0; cvec = br; br = cvec; | |
2b4b57cd | 82 | enrint(0); enxint(0); encollide(0); |
11720282 | 83 | #endif |
11720282 | 84 | addr->en_istat = 0; |
11720282 BJ |
85 | addr->en_owc = -1; |
86 | addr->en_oba = 0; | |
941ee7ef | 87 | addr->en_ostat = EN_IEN|EN_GO; |
11720282 BJ |
88 | DELAY(100000); |
89 | addr->en_ostat = 0; | |
7d6f1cd5 SL |
90 | #ifdef ECHACK |
91 | br = 0x16; | |
92 | #endif | |
11720282 BJ |
93 | return (1); |
94 | } | |
95 | ||
f1b2fa5b BJ |
96 | /* |
97 | * Interface exists: make available by filling in network interface | |
98 | * record. System will initialize the interface when it is ready | |
99 | * to accept packets. | |
100 | */ | |
11720282 BJ |
101 | enattach(ui) |
102 | struct uba_device *ui; | |
103 | { | |
f1b2fa5b | 104 | register struct en_softc *es = &en_softc[ui->ui_unit]; |
ee787340 | 105 | register struct sockaddr_in *sin; |
f1b2fa5b BJ |
106 | |
107 | es->es_if.if_unit = ui->ui_unit; | |
b454c3ea | 108 | es->es_if.if_name = "en"; |
f1b2fa5b | 109 | es->es_if.if_mtu = ENMTU; |
6187f8f4 | 110 | es->es_if.if_net = ui->ui_flags; |
f1b2fa5b | 111 | es->es_if.if_host[0] = |
ee787340 SL |
112 | (~(((struct endevice *)eninfo[ui->ui_unit]->ui_addr)->en_addr)) & 0xff; |
113 | sin = (struct sockaddr_in *)&es->es_if.if_addr; | |
114 | sin->sin_family = AF_INET; | |
115 | sin->sin_addr = if_makeaddr(es->es_if.if_net, es->es_if.if_host[0]); | |
116 | sin = (struct sockaddr_in *)&es->es_if.if_broadaddr; | |
117 | sin->sin_family = AF_INET; | |
118 | sin->sin_addr = if_makeaddr(es->es_if.if_net, 0); | |
119 | es->es_if.if_flags = IFF_BROADCAST; | |
f1b2fa5b | 120 | es->es_if.if_init = eninit; |
b454c3ea | 121 | es->es_if.if_output = enoutput; |
51595ca2 | 122 | es->es_if.if_reset = enreset; |
d9c0644f | 123 | es->es_ifuba.ifu_flags = UBA_NEEDBDP | UBA_NEED16 | UBA_CANTWAIT; |
405c9168 | 124 | if_attach(&es->es_if); |
11720282 BJ |
125 | } |
126 | ||
f1b2fa5b BJ |
127 | /* |
128 | * Reset of interface after UNIBUS reset. | |
129 | * If interface is on specified uba, reset its state. | |
130 | */ | |
131 | enreset(unit, uban) | |
132 | int unit, uban; | |
8a13b737 | 133 | { |
11720282 | 134 | register struct uba_device *ui; |
11720282 | 135 | |
b454c3ea BJ |
136 | if (unit >= NEN || (ui = eninfo[unit]) == 0 || ui->ui_alive == 0 || |
137 | ui->ui_ubanum != uban) | |
f1b2fa5b | 138 | return; |
b454c3ea | 139 | printf(" en%d", unit); |
f1b2fa5b BJ |
140 | eninit(unit); |
141 | } | |
142 | ||
143 | /* | |
144 | * Initialization of interface; clear recorded pending | |
145 | * operations, and reinitialize UNIBUS usage. | |
146 | */ | |
147 | eninit(unit) | |
148 | int unit; | |
149 | { | |
b454c3ea BJ |
150 | register struct en_softc *es = &en_softc[unit]; |
151 | register struct uba_device *ui = eninfo[unit]; | |
f1b2fa5b | 152 | register struct endevice *addr; |
f1b2fa5b BJ |
153 | int s; |
154 | ||
f1b2fa5b | 155 | if (if_ubainit(&es->es_ifuba, ui->ui_ubanum, |
dc39362e | 156 | sizeof (struct en_header), (int)btoc(ENMRU)) == 0) { |
b454c3ea | 157 | printf("en%d: can't initialize\n", unit); |
ee787340 | 158 | es->es_if.if_flags &= ~IFF_UP; |
8a13b737 | 159 | return; |
11720282 | 160 | } |
11720282 | 161 | addr = (struct endevice *)ui->ui_addr; |
8a13b737 | 162 | addr->en_istat = addr->en_ostat = 0; |
11720282 | 163 | |
f1b2fa5b | 164 | /* |
b454c3ea BJ |
165 | * Hang a receive and start any |
166 | * pending writes by faking a transmit complete. | |
f1b2fa5b BJ |
167 | */ |
168 | s = splimp(); | |
b454c3ea | 169 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; |
dc39362e | 170 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
b454c3ea BJ |
171 | addr->en_istat = EN_IEN|EN_GO; |
172 | es->es_oactive = 1; | |
ee787340 | 173 | es->es_if.if_flags |= IFF_UP; |
f1b2fa5b BJ |
174 | enxint(unit); |
175 | splx(s); | |
a13c006d | 176 | if_rtinit(&es->es_if, RTF_UP); |
11720282 BJ |
177 | } |
178 | ||
0658a645 | 179 | int enalldelay = 0; |
4c073c48 | 180 | int enlastdel = 50; |
0658a645 | 181 | int enlastmask = (~0) << 5; |
8a13b737 | 182 | |
f1b2fa5b BJ |
183 | /* |
184 | * Start or restart output on interface. | |
185 | * If interface is already active, then this is a retransmit | |
186 | * after a collision, and just restuff registers and delay. | |
187 | * If interface is not already active, get another datagram | |
188 | * to send off of the interface queue, and map it to the interface | |
189 | * before starting the output. | |
190 | */ | |
ae348eea | 191 | enstart(dev) |
11720282 BJ |
192 | dev_t dev; |
193 | { | |
b454c3ea BJ |
194 | int unit = ENUNIT(dev); |
195 | struct uba_device *ui = eninfo[unit]; | |
196 | register struct en_softc *es = &en_softc[unit]; | |
8a13b737 | 197 | register struct endevice *addr; |
8a13b737 BJ |
198 | struct mbuf *m; |
199 | int dest; | |
11720282 | 200 | |
8a13b737 BJ |
201 | if (es->es_oactive) |
202 | goto restart; | |
f1b2fa5b BJ |
203 | |
204 | /* | |
205 | * Not already active: dequeue another request | |
206 | * and map it to the UNIBUS. If no more requests, | |
207 | * just return. | |
208 | */ | |
209 | IF_DEQUEUE(&es->es_if.if_snd, m); | |
8a13b737 BJ |
210 | if (m == 0) { |
211 | es->es_oactive = 0; | |
11720282 BJ |
212 | return; |
213 | } | |
a453e1b5 | 214 | dest = mtod(m, struct en_header *)->en_dhost; |
8a13b737 | 215 | es->es_olen = if_wubaput(&es->es_ifuba, m); |
f1b2fa5b BJ |
216 | |
217 | /* | |
218 | * Ethernet cannot take back-to-back packets (no | |
0658a645 BJ |
219 | * buffering in interface. To help avoid overrunning |
220 | * receivers, enforce a small delay (about 1ms) in interface: | |
221 | * * between all packets when enalldelay | |
222 | * * whenever last packet was broadcast | |
223 | * * whenever this packet is to same host as last packet | |
f1b2fa5b | 224 | */ |
0658a645 | 225 | if (enalldelay || es->es_lastx == 0 || es->es_lastx == dest) { |
8a13b737 | 226 | es->es_delay = enlastdel; |
0658a645 BJ |
227 | es->es_mask = enlastmask; |
228 | } | |
229 | es->es_lastx = dest; | |
f1b2fa5b | 230 | |
8a13b737 | 231 | restart: |
f1b2fa5b BJ |
232 | /* |
233 | * Have request mapped to UNIBUS for transmission. | |
234 | * Purge any stale data from this BDP, and start the otput. | |
235 | */ | |
ee787340 SL |
236 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
237 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_w.ifrw_bdp); | |
11720282 | 238 | addr = (struct endevice *)ui->ui_addr; |
405c9168 | 239 | addr->en_oba = (int)es->es_ifuba.ifu_w.ifrw_info; |
8a13b737 BJ |
240 | addr->en_odelay = es->es_delay; |
241 | addr->en_owc = -((es->es_olen + 1) >> 1); | |
941ee7ef | 242 | addr->en_ostat = EN_IEN|EN_GO; |
8a13b737 | 243 | es->es_oactive = 1; |
11720282 BJ |
244 | } |
245 | ||
f1b2fa5b BJ |
246 | /* |
247 | * Ethernet interface transmitter interrupt. | |
248 | * Start another output if more data to send. | |
249 | */ | |
11720282 BJ |
250 | enxint(unit) |
251 | int unit; | |
252 | { | |
b454c3ea BJ |
253 | register struct uba_device *ui = eninfo[unit]; |
254 | register struct en_softc *es = &en_softc[unit]; | |
519a1ecf | 255 | register struct endevice *addr = (struct endevice *)ui->ui_addr; |
11720282 | 256 | |
8a13b737 BJ |
257 | if (es->es_oactive == 0) |
258 | return; | |
519a1ecf | 259 | if (es->es_mask && (addr->en_ostat&EN_OERROR)) { |
89413846 | 260 | es->es_if.if_oerrors++; |
519a1ecf BJ |
261 | endocoll(unit); |
262 | return; | |
89413846 | 263 | } |
519a1ecf BJ |
264 | es->es_if.if_opackets++; |
265 | es->es_oactive = 0; | |
266 | es->es_delay = 0; | |
267 | es->es_mask = ~0; | |
7a66118b BJ |
268 | if (es->es_ifuba.ifu_xtofree) { |
269 | m_freem(es->es_ifuba.ifu_xtofree); | |
270 | es->es_ifuba.ifu_xtofree = 0; | |
271 | } | |
f1b2fa5b | 272 | if (es->es_if.if_snd.ifq_head == 0) { |
0658a645 | 273 | es->es_lastx = 256; /* putatively illegal */ |
11720282 BJ |
274 | return; |
275 | } | |
8a13b737 | 276 | enstart(unit); |
11720282 BJ |
277 | } |
278 | ||
f1b2fa5b BJ |
279 | /* |
280 | * Collision on ethernet interface. Do exponential | |
281 | * backoff, and retransmit. If have backed off all | |
ee787340 | 282 | * the way print warning diagnostic, and drop packet. |
f1b2fa5b | 283 | */ |
11720282 BJ |
284 | encollide(unit) |
285 | int unit; | |
286 | { | |
519a1ecf | 287 | struct en_softc *es = &en_softc[unit]; |
11720282 | 288 | |
f1b2fa5b | 289 | es->es_if.if_collisions++; |
8a13b737 | 290 | if (es->es_oactive == 0) |
11720282 | 291 | return; |
519a1ecf BJ |
292 | endocoll(unit); |
293 | } | |
294 | ||
295 | endocoll(unit) | |
296 | int unit; | |
297 | { | |
298 | register struct en_softc *es = &en_softc[unit]; | |
299 | ||
b454c3ea BJ |
300 | /* |
301 | * Es_mask is a 16 bit number with n low zero bits, with | |
302 | * n the number of backoffs. When es_mask is 0 we have | |
303 | * backed off 16 times, and give up. | |
304 | */ | |
8a13b737 | 305 | if (es->es_mask == 0) { |
a453e1b5 | 306 | printf("en%d: send error\n", unit); |
8a13b737 | 307 | enxint(unit); |
b454c3ea | 308 | return; |
11720282 | 309 | } |
b454c3ea BJ |
310 | /* |
311 | * Another backoff. Restart with delay based on n low bits | |
312 | * of the interval timer. | |
313 | */ | |
314 | es->es_mask <<= 1; | |
315 | es->es_delay = mfpr(ICR) &~ es->es_mask; | |
316 | enstart(unit); | |
11720282 BJ |
317 | } |
318 | ||
31c2345c SL |
319 | struct sockaddr_pup pupsrc = { AF_PUP }; |
320 | struct sockaddr_pup pupdst = { AF_PUP }; | |
321 | struct sockproto pupproto = { PF_PUP }; | |
f1b2fa5b BJ |
322 | /* |
323 | * Ethernet interface receiver interrupt. | |
324 | * If input error just drop packet. | |
325 | * Otherwise purge input buffered data path and examine | |
326 | * packet to determine type. If can't determine length | |
327 | * from type, then have to drop packet. Othewise decapsulate | |
328 | * packet based on type and pass to type specific higher-level | |
329 | * input routine. | |
330 | */ | |
11720282 BJ |
331 | enrint(unit) |
332 | int unit; | |
333 | { | |
b454c3ea BJ |
334 | register struct en_softc *es = &en_softc[unit]; |
335 | struct endevice *addr = (struct endevice *)eninfo[unit]->ui_addr; | |
336 | register struct en_header *en; | |
8a13b737 | 337 | struct mbuf *m; |
038ee561 | 338 | int len; short resid; |
b454c3ea | 339 | register struct ifqueue *inq; |
8a13b737 | 340 | int off; |
11720282 | 341 | |
b454c3ea | 342 | es->es_if.if_ipackets++; |
f1b2fa5b BJ |
343 | |
344 | /* | |
b454c3ea | 345 | * Purge BDP; drop if input error indicated. |
f1b2fa5b | 346 | */ |
ee787340 SL |
347 | if (es->es_ifuba.ifu_flags & UBA_NEEDBDP) |
348 | UBAPURGE(es->es_ifuba.ifu_uba, es->es_ifuba.ifu_r.ifrw_bdp); | |
941ee7ef | 349 | if (addr->en_istat&EN_IERROR) { |
f1b2fa5b | 350 | es->es_if.if_ierrors++; |
8a13b737 | 351 | goto setup; |
11720282 | 352 | } |
f1b2fa5b BJ |
353 | |
354 | /* | |
0658a645 | 355 | * Calculate input data length. |
f1b2fa5b BJ |
356 | * Get pointer to ethernet header (in input buffer). |
357 | * Deal with trailer protocol: if type is PUP trailer | |
358 | * get true type from first 16-bit word past data. | |
359 | * Remember that type was trailer by setting off. | |
360 | */ | |
0658a645 BJ |
361 | resid = addr->en_iwc; |
362 | if (resid) | |
363 | resid |= 0176000; | |
dc39362e | 364 | len = (((sizeof (struct en_header) + ENMRU) >> 1) + resid) << 1; |
0658a645 | 365 | len -= sizeof (struct en_header); |
dc39362e | 366 | if (len > ENMRU) |
0658a645 | 367 | goto setup; /* sanity */ |
f1b2fa5b | 368 | en = (struct en_header *)(es->es_ifuba.ifu_r.ifrw_addr); |
8a13b737 BJ |
369 | #define endataaddr(en, off, type) ((type)(((caddr_t)((en)+1)+(off)))) |
370 | if (en->en_type >= ENPUP_TRAIL && | |
371 | en->en_type < ENPUP_TRAIL+ENPUP_NTRAILER) { | |
372 | off = (en->en_type - ENPUP_TRAIL) * 512; | |
dc39362e | 373 | if (off > ENMTU) |
b454c3ea | 374 | goto setup; /* sanity */ |
8a13b737 | 375 | en->en_type = *endataaddr(en, off, u_short *); |
0658a645 BJ |
376 | resid = *(endataaddr(en, off+2, u_short *)); |
377 | if (off + resid > len) | |
378 | goto setup; /* sanity */ | |
379 | len = off + resid; | |
8a13b737 BJ |
380 | } else |
381 | off = 0; | |
8a13b737 BJ |
382 | if (len == 0) |
383 | goto setup; | |
f1b2fa5b BJ |
384 | /* |
385 | * Pull packet off interface. Off is nonzero if packet | |
386 | * has trailing header; if_rubaget will then force this header | |
387 | * information to be at the front, but we still have to drop | |
0658a645 | 388 | * the type and length which are at the front of any trailer data. |
f1b2fa5b BJ |
389 | */ |
390 | m = if_rubaget(&es->es_ifuba, len, off); | |
a453e1b5 BJ |
391 | if (m == 0) |
392 | goto setup; | |
f1b2fa5b | 393 | if (off) { |
0658a645 BJ |
394 | m->m_off += 2 * sizeof (u_short); |
395 | m->m_len -= 2 * sizeof (u_short); | |
f1b2fa5b | 396 | } |
31c2345c SL |
397 | switch (en->en_type) { |
398 | ||
399 | #ifdef INET | |
400 | case ENPUP_IPTYPE: | |
9c8692e9 | 401 | schednetisr(NETISR_IP); |
31c2345c SL |
402 | inq = &ipintrq; |
403 | break; | |
404 | #endif | |
ee787340 | 405 | #ifdef PUP |
31c2345c SL |
406 | case ENPUP_PUPTYPE: { |
407 | struct pup_header *pup = mtod(m, struct pup_header *); | |
408 | ||
409 | pupproto.sp_protocol = pup->pup_type; | |
410 | pupdst.spup_addr = pup->pup_dport; | |
411 | pupsrc.spup_addr = pup->pup_sport; | |
57aa3090 SL |
412 | raw_input(m, &pupproto, (struct sockaddr *)&pupsrc, |
413 | (struct sockaddr *)&pupdst); | |
31c2345c | 414 | goto setup; |
31c2345c | 415 | } |
ee787340 | 416 | #endif |
c8f8184f BJ |
417 | default: |
418 | m_freem(m); | |
419 | goto setup; | |
ee787340 SL |
420 | } |
421 | ||
1e977657 BJ |
422 | if (IF_QFULL(inq)) { |
423 | IF_DROP(inq); | |
ee787340 | 424 | m_freem(m); |
1e977657 BJ |
425 | } else |
426 | IF_ENQUEUE(inq, m); | |
f1b2fa5b | 427 | |
ae348eea | 428 | setup: |
f1b2fa5b BJ |
429 | /* |
430 | * Reset for next packet. | |
431 | */ | |
432 | addr->en_iba = es->es_ifuba.ifu_r.ifrw_info; | |
dc39362e | 433 | addr->en_iwc = -(sizeof (struct en_header) + ENMRU) >> 1; |
941ee7ef | 434 | addr->en_istat = EN_IEN|EN_GO; |
ae348eea | 435 | } |
11720282 | 436 | |
8a13b737 BJ |
437 | /* |
438 | * Ethernet output routine. | |
439 | * Encapsulate a packet of type family for the local net. | |
f1b2fa5b BJ |
440 | * Use trailer local net encapsulation if enough data in first |
441 | * packet leaves a multiple of 512 bytes of data in remainder. | |
8a13b737 | 442 | */ |
ee787340 | 443 | enoutput(ifp, m0, dst) |
8a13b737 BJ |
444 | struct ifnet *ifp; |
445 | struct mbuf *m0; | |
ee787340 | 446 | struct sockaddr *dst; |
11720282 | 447 | { |
8a2f82db | 448 | int type, dest, s, error; |
f1b2fa5b | 449 | register struct mbuf *m = m0; |
8a13b737 | 450 | register struct en_header *en; |
ee787340 | 451 | register int off; |
8a13b737 | 452 | |
ee787340 | 453 | switch (dst->sa_family) { |
11720282 | 454 | |
8a13b737 | 455 | #ifdef INET |
ee787340 | 456 | case AF_INET: |
4e818526 | 457 | dest = ((struct sockaddr_in *)dst)->sin_addr.s_addr; |
8a2f82db SL |
458 | if (dest & 0x00ffff00) { |
459 | error = EPERM; /* ??? */ | |
3734056d | 460 | goto bad; |
8a2f82db | 461 | } |
4e818526 | 462 | dest = (dest >> 24) & 0xff; |
ee787340 SL |
463 | off = ntohs((u_short)mtod(m, struct ip *)->ip_len) - m->m_len; |
464 | if (off > 0 && (off & 0x1ff) == 0 && | |
0658a645 | 465 | m->m_off >= MMINOFF + 2 * sizeof (u_short)) { |
8a13b737 | 466 | type = ENPUP_TRAIL + (off>>9); |
0658a645 BJ |
467 | m->m_off -= 2 * sizeof (u_short); |
468 | m->m_len += 2 * sizeof (u_short); | |
f1b2fa5b | 469 | *mtod(m, u_short *) = ENPUP_IPTYPE; |
0658a645 | 470 | *(mtod(m, u_short *) + 1) = m->m_len; |
f1b2fa5b | 471 | goto gottrailertype; |
8a13b737 | 472 | } |
f1b2fa5b BJ |
473 | type = ENPUP_IPTYPE; |
474 | off = 0; | |
475 | goto gottype; | |
8a13b737 | 476 | #endif |
31c2345c | 477 | #ifdef PUP |
ee787340 SL |
478 | case AF_PUP: |
479 | dest = ((struct sockaddr_pup *)dst)->spup_addr.pp_host; | |
31c2345c SL |
480 | type = ENPUP_PUPTYPE; |
481 | off = 0; | |
482 | goto gottype; | |
31c2345c | 483 | #endif |
8a13b737 BJ |
484 | |
485 | default: | |
ee787340 SL |
486 | printf("en%d: can't handle af%d\n", ifp->if_unit, |
487 | dst->sa_family); | |
8a2f82db SL |
488 | error = EAFNOSUPPORT; |
489 | goto bad; | |
8a13b737 | 490 | } |
f1b2fa5b | 491 | |
b454c3ea | 492 | gottrailertype: |
f1b2fa5b BJ |
493 | /* |
494 | * Packet to be sent as trailer: move first packet | |
495 | * (control information) to end of chain. | |
496 | */ | |
f1b2fa5b BJ |
497 | while (m->m_next) |
498 | m = m->m_next; | |
499 | m->m_next = m0; | |
500 | m = m0->m_next; | |
501 | m0->m_next = 0; | |
b454c3ea | 502 | m0 = m; |
f1b2fa5b | 503 | |
b454c3ea | 504 | gottype: |
f1b2fa5b BJ |
505 | /* |
506 | * Add local net header. If no space in first mbuf, | |
507 | * allocate another. | |
508 | */ | |
a453e1b5 BJ |
509 | if (m->m_off > MMAXOFF || |
510 | MMINOFF + sizeof (struct en_header) > m->m_off) { | |
ef9b4258 | 511 | m = m_get(M_DONTWAIT); |
8a13b737 | 512 | if (m == 0) { |
8a2f82db SL |
513 | error = ENOBUFS; |
514 | goto bad; | |
8a13b737 BJ |
515 | } |
516 | m->m_next = m0; | |
517 | m->m_off = MMINOFF; | |
518 | m->m_len = sizeof (struct en_header); | |
519 | } else { | |
8a13b737 BJ |
520 | m->m_off -= sizeof (struct en_header); |
521 | m->m_len += sizeof (struct en_header); | |
11720282 | 522 | } |
8a13b737 BJ |
523 | en = mtod(m, struct en_header *); |
524 | en->en_shost = ifp->if_host[0]; | |
525 | en->en_dhost = dest; | |
526 | en->en_type = type; | |
f1b2fa5b BJ |
527 | |
528 | /* | |
529 | * Queue message on interface, and start output if interface | |
530 | * not yet active. | |
531 | */ | |
8a13b737 | 532 | s = splimp(); |
1e977657 BJ |
533 | if (IF_QFULL(&ifp->if_snd)) { |
534 | IF_DROP(&ifp->if_snd); | |
8a2f82db SL |
535 | error = ENOBUFS; |
536 | goto qfull; | |
1e977657 | 537 | } |
8a13b737 | 538 | IF_ENQUEUE(&ifp->if_snd, m); |
8a13b737 BJ |
539 | if (en_softc[ifp->if_unit].es_oactive == 0) |
540 | enstart(ifp->if_unit); | |
89413846 | 541 | splx(s); |
4e818526 | 542 | return (0); |
8a2f82db SL |
543 | qfull: |
544 | m0 = m; | |
545 | splx(s); | |
546 | bad: | |
547 | m_freem(m0); | |
548 | return (error); | |
11720282 | 549 | } |